Roofing compound



COATING OR PLASTIC.

and waterproof;

gin or coating upon of plaster, 18 0 o proportions Patented Feb. 15, 1927.

UNITED STATES PATENT OFFICE.

IGNATZ GEDAROVICH, 01E BROOKLYN, NEW YORK.

3 ROOFING COMPOUND.

No Drawing.

This invention relates to roofing compound.

The object of the invention is to provide a roofing compound which will be fireproof to provide a roofing compound which can be kept in containeisin plastic condition and which can be appl ed in the lastiq,. .c0n dition and which" 'Wlll ""fbfi'i'ra" ia r dI'li'riiL and durable outer coverroof structures and walls to which it is applied. This object is attained in the manner hereinafter set forth.

The improved compound comprises substantially 20% of sand 20% of cement asbestos. (11 70 oil varnish, and 18% of oil 0 ar. esiret instead of the sand and cement an equivalent quantity of clay may be utilized. The plaster yvill Hedi 5'50 preferably of the usual 20 quantities of lime; sand and water.

" In preparing tfie compound the plastery material, sand and cement in the proportions mentioned are thoroughly mixed. The oil of tar, asbestos and pure varnish in the mentioned are thoroughly mixed. The two batches are then brought together and are thoroughly mixed and stirred to produce the compound. If desired the varni 1a be .oinitt ed The compound in certain quantities is placed in suitable containers until used.

The water repellent qualities of the com- Application filed November 12. 1925. Serial No. 68,709.

pound are increased by increasing the percentage of the sand and cement or by substituting an equivalent amount of m in lieu of the sand and cement. The heat resisting qualities may be varied according to the uses to which the compound is to be put by increasing the proportion of the powdered asbestos.

The compound is applicable to all forms of lathing including Wire lathing, to rough board structure, and is capable of application for efi'ccting repairs to all kinds of exterior surfaces. After the compound has been applied the same dries and hardens and becomes a firm and durable coating or covering of a homogeneous character.

The oil of tar used gives to the compound a certain amount of elasticity which compensates for expansion and contraction due to varying temperature and thus prevents cracking of the coating or covering formed.

It is to be understood that the particular proportions set forth hereinabove are not to be strictly adhered to as the proportions of the respective ingredients employed may be varied to meet diii'erent conditions.

TVhat I claim is:

A roofing compound consisting substantially of 20% sand, 20% cement, 20% plaster, 18% asbestos, 4% varnish, and 18% oil of tar.

IGNATZ GEDAROVICH. 

